- var_dump: documentation ( source)
- preg_match: documentation ( source)
<?php
$input = 'Nome: sad \n<br>\nEmail: god@god.sky\n<br>\nTelefone: 13123';
$pattern = '#Email:\s*([^\s<]+)#i';
preg_match($pattern, $input, $match);
var_dump($match);
echo $match[1];